SL227R010A

Overview

The SL227R010A is a negative temperature coefficient (NTC) thermistor inrush current limiter from the Vishay Ametherm SL22 series. It features a nominal resistance of 7 Ohms with a tolerance of ±20%. The component has a maximum steady-state current rating of 10 A and voltage ratings of 115 VAC or 230 VAC. It utilizes a radial leaded package with a disc diameter of 22 mm, width of 6 mm, and lead spacing of 7.8 mm. Designed for PCB mounting, it effectively limits initial surge currents to protect downstream electronic components.

Feature Summary

• Utilizes NTC thermistor technology to provide high initial resistance that decreases as temperature rises
• Protects sensitive circuitry by limiting high inrush currents during power-up phases
• Radial leaded construction facilitates through-hole PCB integration

Applications

• Switching power supply input stages
• Power factor correction circuits
• General electronic equipment requiring surge protection

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's latest datasheet to confirm dimensional tolerances and marking codes. Ensure the operating environment remains within the specified thermal limits to prevent premature aging. Confirm that the 10 A steady-state current rating aligns with the application's continuous load requirements before finalizing procurement.

Selection Notes

Select this component when a 7 Ohm cold resistance is required to manage inrush energy in 115 VAC or 230 VAC systems. The 22 mm diameter provides sufficient thermal mass for 10 A applications. Compare against higher resistance variants if lower initial current limiting is needed, or larger diameters if higher current capacity is required.

Part Context

This part belongs to the SL22 series of inrush current limiters, designed for robust performance in AC mains applications. The series offers various resistance and current combinations to suit different power levels. Vishay Ametherm manufactures these components using specialized ceramic materials optimized for repeated thermal cycling and long-term reliability in industrial and consumer electronics.

Replacement Considerations

SL227R010

FAQ

What is the maximum steady-state current rating?

The SL227R010A is rated for a maximum steady-state current of 10 A.

Does this component support both 115 VAC and 230 VAC?

Yes, the datasheet specifies voltage ratings for both 115 VAC and 230 VAC applications.